What do you mean by "it have being translate to other language"? If your TsiLang component has more than one language, then it holds as original captions (Languge #1) as well as translated to other languages ones. You will need just set TsiLang.ActiveLanguage = 1 in design-time and all captions on the form will get their original values.

You can use in run-time the TsiLang's public method
function GetStringValue(AStrings: pStrings; AName: Tstring; ALang: Integer): Tstring;
where AStrings - pointer to a string list; AName - name of a component or string identifier; ALang - number of language (use 1 for default language).